> Michael Crawford wrote: > >> Though I recall reading not all ARM chips have all of them. > >> ie. some might actually only have the TLBs like what PPC does... > > > > ARM7 doesn't have either MMU or TLB. You can only use physical > > memory. > > > > But it's still worth supporting, as you would be able to run on a > > lot > > of really low-power hardware. > > > > Linux has the option to run with no MMU. This was done as a patch > > for > > a long time, but I understand that it was accepted into the > > mainline > > kernel, so now it's a config option. > > > > I had the NewOS kernel running on a 486 way back, so it's possible. > And 486 do have an mmu! even 286 do. François.